IsSimpleGraph( gamma )
This boolean function returns true
if and only if the graph gamma is
simple, that is, has no loops and whenever [x,y] is an edge then so
is [y,x].
gap> IsSimpleGraph( CompleteGraph( Group( (1,2,3) ), 3 ) ); true gap> IsSimpleGraph( CompleteGraph( Group( (1,2,3) ), 3, true ) ); false
GAP 3.4.4